I bought some pickups off ebay. Humbucker fat strat and humbucker Bullet and i dont know if they are neck or bridge or middle. Will this matter when i hook it up? like am i gonna fry somethin or is the sound just gonna be messed up>?
If you install them correctly, the worst that will happen will be unsatisfactory tone.
Usually, people install a hotter pickup in the bridge since there is less string movement you need something a bit stronger.
If I were you, I'd check the specs and start there.